Welcome to the Winobloggers webpage! Students and professors from different universities meet to discuss their findings on Winogradsky columns they constructed!
We learn how to formulate hypotheses, observe, comment, ask and reply to questions related to our scientific experiments.

Winogradksy columns

'In the field of observation, chance only favors the prepared mind' Pasteur 1854

Blog posts

Sunday, 20 May 2018

UCA_7B,8B_1: Day 44

Winogradsky column- Day 44

Group 7B (Lucas Garín Ortega and Alba Mejías Gallardo)

Group 8B (Laura Lucena del Amo and Noelia Moares Fernández)

After 44 days, we have checked our columns and we have observed a few changes.

The column made by group 8B, the one exposed to sunlight, didn't have a lot of changes. We could see that the layer of lighter color previously seen was bigger than before, that means that there were more photoautrophic microorganisms. Also, we could appreciate that there were more bubbles, formed by the sugar fermentation of microorganisms chemoheterotrophs.

Group 8B column

The column made by group 7B, the one kept in the dark, has suffered the following changes. We could appreciate that the column was darker due to the H2S breathing of bacteria. The water on the surface has cleared and an orange layer has formed on the surface. This could be because of the proliferation of photoorganoheterotroph microorganisms. Last but not least, a lighter spot has been formed from a bubble generated by microorganisms breathing.